共查询到20条相似文献,搜索用时 515 毫秒
1.
2.
3.
4.
5.
Inside Back Cover: The Reactivities of Iminoboranes with Carbenes: BN Isosteres of Carbene–Alkyne Adducts (Angew. Chem. Int. Ed. 5/2015) 下载免费PDF全文
Prof. Dr. Holger Braunschweig Dr. William C. Ewing Dr. K. Geetharani Marius Schäfer 《Angewandte Chemie (International ed. in English)》2015,54(5):1677-1677
6.
7.
8.
Glen P. Junor Jan Lorkowski Dr. Cory M. Weinstein Dr. Rodolphe Jazzar Prof. Dr. Cezary Pietraszuk Prof. Dr. Guy Bertrand 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(49):22212-22217
Selenium NMR has become a standard tool for scaling the π-accepting character of carbenes. Herein, we highlight that non-classical hydrogen bonding (NCHB), likely resulting from hyperconjugation, can play a significant role in the carbene–selenium 77Se NMR chemical shift, thus triggering a non-linear behavior of the Se-Scale. 相似文献
9.
10.
Back Cover: Activation of Elemental Sulfur at a Two‐Coordinate Platinum(0) Center (Chem. Eur. J. 36/2016) 下载免费PDF全文
Dr. Sudipta Roy Christian J. Schürmann Totan Mondal Dr. Debasis Koley Dr. Regine Herbst‐Irmer Prof. Dr. Dietmar Stalke Prof. Dr. Herbert W. Roesky 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(36):12944-12944
11.
Guilherme M. D. M. Rúbio Prof. Bernhard K. Keppler Prof. Jia Min Chin Prof. Michael R. Reithofer 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(68):15859-15862
N-heterocyclic carbenes (NHCs) have received significant attention as gold nanoparticle stabilizers due to their strong binding affinity towards gold. However, their tunability is limited by the difficulty in obtaining nonsymmetric NHCs. In this regard, N-acyclic carbenes (NACs) are attractive alternatives due to their high synthetic versatility, allowing easy tuning of their steric and electronic properties towards specific applications. This work reports the first series of stable and monodisperse NAC-functionalized gold nanoparticles. These particles with sizes ranging 3.8 to 11.6 nm were characterized using NMR, UV/Vis and TEM. The nanoparticles display good stability at elevated temperatures and for extended periods both dried or dispersed in a medium, as well as in the presence of exogenous thiols. Importantly, these NAC-stabilized gold nanoparticles offer a promising and versatile alternative to NHC-stabilized gold nanoparticles. 相似文献
12.
Dr. Konstantin I. Galkin Bogdan Ya. Karlinskii Dr. Alexander Yu. Kostyukovich Dr. Evgeniy G. Gordeev Prof. Dr. Valentine P. Ananikov 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(39):8567-8571
This work reveals ambident nucleophilic reactivity of imidazolium cations towards carbonyl compounds at the C2 or C4 carbene centers depending on the steric properties of the substrates and reaction conditions. Such an adaptive behavior indicates the dynamic nature of organocatalysis proceeding via a covalent interaction of imidazolium carbenes with carbonyl substrates and can be explained by generation of the H-bonded ditopic carbanionic carbenes. 相似文献
13.
14.
15.
16.
Back Cover: Alkali‐Metal‐Mediated Magnesiations of an N‐Heterocyclic Carbene: Normal,Abnormal, and “Paranormal” Reactivity in a Single Tritopic Molecule (Angew. Chem. Int. Ed. 47/2015) 下载免费PDF全文
Dr. Antonio J. Martínez‐Martínez Dr. M. Ángeles Fuentes Dr. Alberto Hernán‐Gómez Prof. Eva Hevia Dr. Alan R. Kennedy Prof. Robert E. Mulvey Dr. Charles T. O'Hara 《Angewandte Chemie (International ed. in English)》2015,54(47):14192-14192
17.
Back Cover: Experimental and Theoretical Study of the Reactivity of Gold Nanoparticles Towards Benzimidazole‐2‐ylidene Ligands (Chem. Eur. J. 30/2016) 下载免费PDF全文
Dr. María Rodríguez‐Castillo Gustavo Lugo‐Preciado Dr. Danielle Laurencin Dr. Frederik Tielens Dr. Arie van der Lee Dr. Sébastien Clément Dr. Yannick Guari Dr. José M. López‐de‐Luzuriaga Dr. Miguel Monge Dr. Françoise Remacle Dr. Sébastien Richeter 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(30):10680-10680
18.
Prof. Shabana Khan Prof. Dr. Herbert W. Roesky 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(7):1636-1648
The isolation of stable carbenes, such as N-heterocyclic carbenes, cyclic alkyl amino carbenes, and abnormal N-heterocyclic carbenes, has encouraged synthetic chemists to use them as neutral ligands for stabilizing unusual compounds with main group elements. In this Minireview, an overview is provided of the recent developments in the chemistry of carbene-stabilized silicon halides, in which the silicon atoms are in low oxidation state. The structural diversities emanating from the differences in the HOMO–LUMO gaps of various carbenes will also be discussed. 相似文献
19.
A series of bimetallic complexes have been synthesized that are supported by a 4‐phosphino‐substituted NHC ligand. The use of this stable ligand reduces the number of synthetic steps and allows for a wide range of metal combinations to be introduced into the complexes. 相似文献